The Fatigue data frame has 262 rows and 3 columns.
Arguments
source
Lu, C. Joséph , and Meeker, William Q. (1993), Using degradation
measures to estimate a time-to-failure distribution,
Technometrics, 35, 161-174
Details
These data are given in Lu and Meeker (1993) where they state
``We obtained the data in Table 1 visually from figure 4.5.2 on page 242
of Bogdanoff and Kozin (1985).''
The data represent the growth of cracks in metal for 21 test units.
An initial notch of length 0.90 inches was made on each unit which then
was subjected to several thousand test cycles. After every 10,000
test cycles the crack length was measured. Testing was stopped if the
crack length exceeded 1.60 inches, defined as a failure, or at 120,000
cycles.